A deep cleaning removes hardened plaque and bacteria from below the gumline, where brushing cannot reach.
The NHS describes early gum disease being managed with cleaning advice and hygienist care, while serious disease can need deep cleaning under the gums. The procedure scales tartar off the root surfaces and smooths the roots so the gum can tighten back against the tooth. It is done with local anaesthetic, often across two or more visits. Expect tender gums and sensitivity for a few days after. Gum disease is driven by plaque bacteria building up, so the deep clean is a reset, not a cure: interdental cleaning every day and regular hygienist reviews are what keep the pockets from coming back.
What to do
Common questions
What is a deep cleaning at the dentist?
A regular cleaning polishes the visible parts of your teeth; a deep cleaning goes under the gumline. Dentists recommend it when gum disease has formed pockets between the gum and tooth roots, where hardened plaque (tartar) and bacteria collect beyond the reach of brushing. NHS guidance on gum disease says early-stage disease is managed with cleaning advice, stopping smoking, and hygienist visits, while serious disease can need deep cleaning under the gums. The procedure has two parts: scaling scrapes tartar off the teeth and root surfaces, and root planing smooths the roots so the gum can reattach. It is usually done with local anaesthetic, often split across two or more appointments by mouth half or quadrant. Afterward, expect sore gums and temperature sensitivity for a few days, and possibly slight bleeding when you brush at first. The important truth: the deep cleaning resets the environment, but it only works long-term with upgraded home care, interdental brushes or floss daily, and often more frequent hygienist visits afterward, since gum disease is a chronic condition you manage rather than cure once.